The full command-line option is /[NO]SHOW=(item,...).

    Modifies the output listing file. This qualifier is meaningful
    only when /LIST is specified. Valid items are:

    Option         Function

    BINARY         Lists macro expansions that generate binary code.
                   BINARY is a subset of EXPANSIONS.
    CONDITIONALS   Shows sections of code conditionally skipped.
    EXPANSIONS     Shows macro expansions.
    INCLUDE        Shows all .INCLUDE files.
    LIBRARY        Shows macro library modules.

    The default option is /SHOW=CONDITIONALS.